Her on-duty periods consisted of two daily shifts, each of about two Earth-hours. In case of an emergency message reaching her during any other time, she was to report at once to her tower-post and remain on duty for the duration. And this was her first shift. She wondered how long it would take the Martians that had possessed Revere to seek her out and test her defenses. Apparently these invisible creatures operated upon a time-scale of their own, making themselves felt without semblance of rhythm or regular schedule. Shutting out the meaningless scramble of thoughts that reached her from the Earth-village below, Lynne considered Revere and the odd constraint that had prevailed between them during their brief single meeting. Somewhere beyond the gaunt reddish Martian hills to the southeast, the planet-ship was carrying him swiftly toward New Samarkand--and, she hoped, toward rehabilitation. Revere had had a rough deal on this outpost world. Although he seemed not to resent it Lynne found herself trembling with indignation at thought of the needless torture he had undergone--merely to give Lynne the induced headaches that had undermined her Earth-conditioning. She thought of Rolf and his thousand-and-two women. And from somewhere, half a planet away, came a quick mocking thought from the Svengali who had led her to a planet she had never had the slightest desire to visit. It said, _Don't bother me now, Lynne--can't you see I'm busier than_ farb? So thrilling was the experience, so magnificent the surge of power which swept through her, that Lynne actually forgot to be angry at receiving such a quick brush-off. Even a half-world away, she thought, she could key in on Rolf, learn what he was doing. A thousand-and-one other women? She sipped sparingly at her oxyrespirator, felt reinforced exhilaration. With her new-found ability she was going to be able to check up on his alleged love-life. She actually gloated as she sat there alone amid the spare Martian landscape. Then, feeling somewhat ashamed, she thought of her twin again. Evidently he was keeping his mind closed for she could not reach him. She wondered what he was really like, what--say--Lao Mei-O'Connell felt about him. And all at once she knew, for the Eurasian woman's mind was an open book. The Barkutburg leader was almost physically sick at Revere's departure. Her thoughts of love, of desolation, were so strong that Lynne found herself sharing them, even though she had seen her twin but a scant few minutes since attaining an age of reason. Yet there were strength and determination and a strong sense of duty holding Lao Mei-O'Connell to her important tasks of seeing that her share of reclaiming a planet continued. The frail-looking Martian woman was, Lynne realised, a person of vast character.